Science & Technology

EPA's Office of Water helps to ensure that the latest water pollution science and best available control technologies support our program goals to keep water safe and clean.

Analytical Methods and LaboratoriesLearn about the EPA-approved analytical methods and laboratories that water systems must use when analyzing samples to meet federal monitoring requirements or to demonstrate compliance with federal water regulations.

Applications & DatabasesFind valuable information on a host of different databases, maps, models, and tools. Includes popular applications such as, the Clean Watershed Needs Survey (CWNS), STORET,WATERS, AQUATOX, and Surf Your Watershed.

Climate ChangeOffers comprehensive, accessible, and meaningful climate change information for all parts of society – communities, individuals, business, states and localities, and governments.

Contaminants of Emerging ConcernPharmaceuticals and personal care products are detectable at low levels in surface water. EPA has made it a priority to determine impacts on human health and the ecosystem and to regulate accordingly.

Drinking WaterProvides information on drinking water health advisories, other human health risk assessments, and science support for drinking water regulatory determinations.

Monitoring & AssessmentWater quality data are used to characterize waters, identify trends and emerging problems, determine the efficacy of pollution control programs, direct pollution control efforts, and respond to emergencies such as floods and spills. View data or find out how you can help.